Percarbonate in a water-soluble film for bleaching human hair

Abstract

The object of the present disclosure is a cosmetic agent for blonding human hair comprising(i) a sachet that forms a closed chamber that comprises a water-soluble polymer, and(ii) a bleaching composition, which is contained in closed chamber of the sachet, exemplified in that the bleaching composition contains at least one percarbonate andat least one persulfate.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to German Patent Application No. 10 2017 222 124.0, filed Dec. 7, 2017, which is incorporated herein by reference in its entirety.TECHNICAL FIELD[0002]The present disclosure relates to a cosmetic agent for dyeing human hair blond comprising (i) a sachet that forms a closed chamber and comprises a water-soluble polymer, and (ii) a bleaching composition which is contained in the closed chamber of the sachet. The present disclosure relates further to a method for dyeing human hair blond and the use of the cosmetic agent to dye human hair blond.BACKGROUND[0003]To lighten or dye their hair blond or generally to make an oxidative colour change has been the desire of many consumers since time immemorial, because a blond hair colour is considered to be attractive and a worthwhile objective from a fashion point of view. For this purpose, various lightening agents with different lightening strengths are available on ...

AI Technical Summary

Benefits of technology

This patent describes cosmetic agents and methods for blonding human hair. The agents include a sachet with a closed chamber and a bleaching composition inside. The composition includes at least one percarbonate and at least one persulfate, as well as a water-soluble polymer. The water-soluble polymer may be a polyvinyl alcohol polymer with a specific molecular weight. The bleaching composition also includes an alkali, such as sodium silicate or potassium silicate. The technical effect of this patent is to provide a more effective and precise method for blonding human hair, resulting in a more natural-looking finish.

Problems solved by technology

For example, application of hydrogen peroxide to the scalp can lead to irritation.

Furthermore, using hydrogen peroxide to lighten the hair entails a certain damage to the hair, since not only the dyes but also the other structural components of hair are damaged by oxidation.

Depending on the nature of this degree of damage, it may take any form from coarse, brittle hair which is difficult to comb, to reduced resilience or tensile strength and split ends, and ultimately even hair breakage.

The larger the quantity of hydrogen peroxide and peroxodisulfates used, as a rule the greater the damage the keratin fibre suffers.

Thus it is also still a permanent challenge to find new lightening agents that are less damaging to hair.

This represents a particular challenge the given context, because usual lightening agents contain alkalising agents as well as a hydrogen peroxide precursor, wherein this precursor must not be converted into hydrogen peroxide by moisture getting into the sachet while it is being stored, and this limits the shelf life of the cosmetic product.

The problem underlying the present disclosure is in providing a cosmetic blonding agent which guarantees a safe dosage, provides sufficient lightening effect without damaging the hair excessively, and is stable during storage.